At current, we only support dragging in a MIDI file (or a temporary MIDI file) into the patterns window. For Logic Pro X, it just don't drag-out anything from its window, so it won't work. For Studio One 3, the stuff it drags out is in "musicloop" format, not a standard MIDI file.

As a temporary workaround, you can export the notes into MIDI file using host DAW, then drag it into Heavier7Strings patterns window. In addition, we are working on supporting Studio One's musicloop format, and this minor update will be released within weeks.